错误objective-c IN APP PURCHASE实现

Question

我正在实施IN APP购买，我不是一个非常有经验的开发人员。 我正在使用我在这里找到的brant troy教程： Tutorial

我在loadStore方法实现中遇到错误： 将“InAppPurchaseManager * const __strong”发送到不兼容类型“id”的参数

//
//  InAppPurchaseManager.h
//

#import <Foundation/Foundation.h>
#import <StoreKit/StoreKit.h>

@interface InAppPurchaseManager : NSObject <SKProductsRequestDelegate>
{
    SKProduct *proUpgradeProduct;
    SKProductsRequest *productsRequest;
}

// public methods
- (void)loadStore;
- (BOOL)canMakePurchases;
- (void)purchaseProUpgrade;

@end

---

#import "InAppPurchaseManager.h"

#define kInAppPurchaseProUpgradeProductId @"com.user.app.product"

@implementation InAppPurchaseManager

- (void)loadStore
{
    // restarts any purchases if they were interrupted last time the app was open

    [[SKPaymentQueue defaultQueue] addTransactionObserver: self];
ERROR HERE: Sending 'InAppPurchaseManager *const __strong' to parameter of incompatible type 'id<SKPaymentTransactionObserver>'

    // get the product description (defined in early sections)
    [self requestProUpgradeProductData];
}

@end

任何人都可以帮助我吗？

Answer 1

答案就像kperryua所说，但只是为了说清楚：

@interface InAppPurchaseManager : NSObject <SKProductsRequestDelegate,SKPaymentTransactionObserver>
{
SKProduct *proUpgradeProduct;
SKProductsRequest *productsRequest;
}

// public methods
- (void)loadStore;
- (BOOL)canMakePurchases;
- (void)purchaseProUpgrade;

@end

它应该可以正常工作。

Answer 2

您需要声明InAppPurchaseManager符合SKPaymentTransactionObserver协议。